Endless traveling water screen



June 19, 1934. L G, BLEYER ENDLESS TRAVELING WATER SCREEN Original Filed March l5, 1950 2 Sheets-Sheet June 19, 1934. L.. G. BLEYER ENDLEss TRAVELING WATER SCREEN 2 Sheets- Sheet Original Filed March 15 1950 Patented June 19, 1934 UNIT-Eo s1.- AT

ENDLESS TRAVELING WATER SCREEN Lloyd G. Bleyer, Milwaukee, Wis.,y assignor to poration of Wisconsin Chain Belt Company, Milwaukee, Wis., a cor- -original application March 15, 1930, serial No.

436,212. Divi ded` and this application September 23,l 1931, Serial No. 564,661

4 Claims. (Cl. 21o-175) This invention relates to endless traveling water=screens and has for one of its objects to improve the construction of prior devices of this character whereby they may be rendered more 5 efficient` in use'and less expensive in maintenance.

lThe invention relates moreparticularly to endless traveling water screens of the type which comprises a` pair `of laterally spaced endless chains,l which pass around vertically spaced sprockets, each link of which chainsv has secured to it` a. screen basket Athrough which the water passes in'order that the refuse carried thereby may be-separated outupon the screen surface. Ithas beenfound' inthe actual operation of such screens, especially where the water contains relatively large amounts of harsh abrasive substances, such asfoundry slag, coal cinders and the like that excessive wear occurs uponthe pintle-rolls of'the chains, necessitating` frequent removal-and renewal of these rolls. Inasmuch as these pintle rollsv are usually mounted intermediatethe spaced side bars ofthe chain links and since `the-screen baskets are secured to said sidebars,nit has heretofore been necessary to disconnecty the chain bars from the baskets'and to dismantle-the chain in order to remove worn lpin- -Vshown Yin Figure 2 as seenfrom the right of the .said figure; and

tle rolls.

Traveling water screens of this character are usually provided, in addition to the head and tail sprockets aroundwhich the chains pass, with intermediate vertical guide members with which the pintle rolls engage during the vertical up-run of the screen and it is the travel of the rolls along these vertical guides which results in the 36 greatest wear on the said rolls, since they do not ordinarily contact with the boot sprocket wheels. Therefore, if provision is made to eliminate the engagement of the pintle rolls with the vertical intermediate guide members during the up-run 40 of the screen, while at the same time providing suitable support for the screen baskets and chains throughout this up-run-since the water pressure is usually sufficient to make such support necessary or desirable-the major portion 45 of the wear which now occurs upon the pintle rolls may be eliminated.

It is, therefore, the primary object of the present invention to provide means which, while furnishing the necessary lateral support for the chains and baskets on the up-run of the screen,

will relieve the chain pintle rolls from their engagement with the vertical guides and thereby eliminate, to a great extent, the wear which now occurs thereon. Y

A further object of the invention is to provide 'Referring-to the accompanying means for accomplishing the above desirable result comprising additional rollers or members which may engage thevertical guides to furnish the necessary horizontal support, which rollers or members are so mountedasto be readily 'accessible to the'end that they may be removed and replaced without the necessity of dismantling the chain and disconnecting the screen baskets.

With the above and other objects in View which will appear as the desc'zrir'ition` proceeds, the invention'consists in thenovel'details of constructionandcombinations of 'parts more fully hereinafter described and particularly pointed out in the appended claims.` y

drawings forming a part of this specification in which like reference characters designate like parts in all the viewsf---tvv Figure 1 is a side elevational view, partly broken away, of a wellA known form of endless traveling water screenV embodying the present inven- Figure 2 is an enlarged'vertical sectional View through therarticulating joint of a pair of screen baskets;

Figure 3 is an elevational View of the parts Figure"4"isa' horizontal sectional4 view taken approximately on the plane indicated bythe line 4-4 of Figure 2 looking in the direction of the arrows. v

Referring more'particularly to the said drawings there is illustrated an endless traveling water screen, comprising a frame-work 15 upon which are journalled head sprockets 16, aboutwhich pass the endless chains 1'7 constituting the supports for the screen baskets 18. The frame15 comprises in part the vertically extending Z-bars 19, one flange 20 of which is receivable in grooved socket members which are imbedded in the side walls 22 of the water conduit. The webs 23 of the Z-bars 19 extend parallel to the faces of the walls 22 and the forward flanges 24 of the said bars 19 extend inwardly to form trash seals with the fabricated side members 25 of the screen baskets, as is well known in the art. Boot or tail sprockets 26 are suitably journalled upon the framework 15 adjacent the bottom of the water conduit and the chains 17 pass around these sprockets, as will be readily understood.

Intermediate the sprockets 16 and 26 there is provided the vertically extending angles or guides 27 which constitute in conjunction with the rolls to be hereinafter described the means for taking the horizontal thrust imposed upon the screen by the force of the water as it ows therethrough. The chains 17 are provided with pintle rolls 28 which are journalled upon bushings surrounding the chain pins 29, and in previous constructions these pint'le rolls have engaged with the vertical guides 27 during the Lip-run of the chain to furnish the necessary horizontal support for the screens. These pintle rolls engage the teeth 3f) of head sprockets 16 whereby motion may be irnparted to the chains and screens, but ordinarily the boot sprockets 26 are so formed or cut away as at 31 that the said rolls do not contact therewith.

As above stated the pintle rolls 28 of the chains 17 are ordinarily mounted intermediate the side bars 32 of the said chains and when wear occurs upon such rolls obviously the chain pins 29 must be withdrawn and the chains and basketsV disconnected in order that such rolls may be removed and renewed. This is a rather diiiicult and expensive procedure and in order to eliminate the necessity therefor, I have provided the additional rolls 33 journalled upon readily removable stub shafts 36 mounted in extensions 37 of the fabricated side members 25 of the screen baskets. As will be clearly seen from Figure 1 these rolls engage the vertical guides 27 during the up-run of the screen and serve to transmit the horizontal thrust of the said baskets to the vertical guides 27, While at the same time maintaining the pintle rolls 28 out of engagement with the said vertical guides whereby the objectionable wear upon the same may be eliminated.

As will be clear from Figures 3 and 4 the additional rolls 33 are off-set inwardly, or in other words are out oi alignment with the pintle rolls 28, and therefore the said additional rolls do not engage with either the head or the boot sprockets. If necessary the peripheral anges of these sprockets may be slightly cut away in order to clear the said rolls 33, as will be readily understood by those skilled in the art.

If, after long continued use, the additional rolls 33 or their pintles show excessive Wear they may of course be readily removed and replaced without disturbing the chain pintles 29 or the chain pintle rolls 28 and dismantling the chain, for the said additional rolls 33 are entirely independent of the chain connections and may be readily removed and replaced without reference to the latter.

This application is a division of my prior copending application entitled Endless traveling Water screens led March 15, 1930, Serial No. 436,212, now Patent No. 1,874,736 dated August 30, 1932.

It is obvious that those skilled in the art may vary the details of construction as well as the precise arrangement of parts without departing from the spirit oi the invention, and therefore it is not wished to be limited to the above disclosure except as may be required by the claims.

What is claimed is:

1. In an endless traveling water screen, a basket supporting chain; screen baskets secured to said chain; a guiding sprocket for said chain; an additional guiding element adjacent said sprocket; and thrust rolls carried by said baskets, engageable with said additional guiding element.

2. n an endless traveling water screen, a plurality of basket supporting chains having sprocket-engaging pintle rolls; screen baskets secured to said chains; guiding sprockets for said chains; additional guiding elements offset laterally inwardly with respect to said sprockets; and thrust rolls mounted on said baskets in alinement and engageable with said offset guiding elements.

3. In an endless traveling water screen, a basket supporting chain having sprocket-engaging pintle rolls; screen baskets having side members having extensions secured to said chain; a guiding sprocket for said chain; an additional guiding element offset laterally with respect to said sprocket; and thrust rolls mounted in the eXtensions of the side members or" said baskets in alinement and engageable with said offset guiding member.

4. ln conveying apparatus, a pair of spaced traveling chains; load-carrying elements secured to said chains to travel therewith; Xed supporting elements offset laterally and transversely of said chains; and thrust elements carried by said load-carrying elements intermediate said pair of chains and engageable with said supporting ele- 320 ments, said thrust elements by reason of their position being readily mountable and demountable without dismantling said chains. 

